turn_transport: fix race condition in shutdown function

GitLab: #27
Change-Id: Id3b73839951ef40e99a424148290252a99879a8b
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d4ffb09..e71ca35 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -372,6 +372,10 @@
     target_link_libraries(tests_ice PRIVATE dhtnet fmt::fmt PkgConfig::Cppunit)
     add_test(NAME tests_ice COMMAND tests_ice)
 
+    add_executable(tests_turnCache tests/turnCache.cpp)
+    target_link_libraries(tests_turnCache PRIVATE dhtnet fmt::fmt PkgConfig::Cppunit)
+    add_test(NAME tests_turnCache  COMMAND tests_turnCache)
+
     #add_executable(tests_stringutils tests/testString_utils.cpp)
     #target_link_libraries(tests_stringutils PRIVATE dhtnet fmt::fmt PkgConfig::Cppunit)
     #add_test(NAME tests_stringutils COMMAND tests_stringutils)